Method of manufacturing an optical head

• US 20020007651A1
• Filed: 05/16/2001
• Published: 01/24/2002
• Est. Priority Date: 05/16/2000
• Status: Abandoned Application

• Current Assignee: Minolta Corporation Limited (Konica Minolta Inc.)
• Original Assignee: Minolta Corporation Limited (Konica Minolta Inc.)
• Inventors: Kobayashi, Yasushi, Kuiseko, Manami
• Application Number:
  US09/855,844
• Publication Number:
  US 20020007651A1
• Time in Patent Office: Days
• US Class Current: 65/23
• CPC Class Codes: B82Y 20/00 Nanooptics, e.g. quantum optics or photonic crystals
• CPC Class Codes: B82Y 35/00 Methods or apparatus for measurement or analysis of nanostructures
• CPC Class Codes: C03C 17/34 with at least two coatings having different compositions C03C17/44 takes precedence
• CPC Class Codes: C03C 2218/365 Coating different sides of a glass substrate
• CPC Class Codes: G01Q 60/22 Probes, their manufacture, or their related instrumentation, e.g. holders

Abstract

A method of manufacturing an optical head having a near-filed light generating element that condenses a luminous flux on an exit surface. The generating element has a reflecting or light intercepting film formed on the exit surface and is fixed to a holding member to form an optical head. A minute opening is then formed in the reflecting or light intercepting film by use of light emitted from a first or second light source.

Claims

1. A method of manufacturing an optical head having a near-field light generating element that condenses a luminous flux on an exit surface, comprising:

fixing the near-field light generating element, having a film formed on the exit surface, to a holding member to form an optical head; and

forming an opening in the film by use of light emitted from at least one of a first light source and a second light source, the second light source disposed in a position conjugate with the first light source.

2. The method of claim 1, wherein the film is a reflecting film or a light intercepting film.

3. The method of claim 1, wherein the first light source and the second light source have the same focusing point.

4. The method of claim 1, wherein light emitted from the second light source has a shorter wavelength than light emitted from the first light source.

5. The method of claim 4, wherein the opening is formed by vaporizing the film using energy generated at the point of the condensed luminous flux.

6. The method of claim 1, wherein the generating element is a solid immersion mirror or a solid immersion lens.

7. The method of claim 6, wherein the solid immersion mirror comprises:

a first surface of the mirror; and

a second surface of the mirror, a first portion of the film being provided on a central part of the first surface and a second portion of the film being provided on substantially an entire area of the second surface.

8. The method of claim 7, wherein the first surface is concave and the second surface is paraboloid of revolution.

9. The method of claim 7, wherein the first surface is planar and the second surface is a parabaloid of revolution.

10. The method of claim 7, wherein the first surface is convex and the second surface is a paraboloid of revolution.

11. The method of claim 6, wherein the solid immersion mirror comprises:

a first surface which is plane surface;

a second surface which is a diverging surface having a first and second part into which a paraboloid is cut along an optical axis;

a third surface which is a condensing surface having a third and fourth part into which a paraboloid is cut along an optical axis; and

a fourth surface which is a plane surface and includes a focal point of the third surface.

12. The method of claim 11, further comprising:

providing the film on substantially an entire surface of the second, third and fourth surfaces;

emitting the light incident on the first surface; and

reflecting the light on the second surface and the third surface, and imaging the light on a central part of the fourth surface.

13. The method of claim 6, wherein the solid immersion mirror comprises:

a first surface which is a plane surface;

a second surface which is a condensing surface having two parts into which a paraboloid of revolution is cut along an optical axis; and

a third surface which is a plane surface including a focal point of the second surface.

14. The method of claim 13, further comprising:

providing the film substantially on an entire surface area of the second a third surfaces;

emitting the light incident on the first surface; and

reflecting the light on the second surface, and imaging the light on a central part of the third surface.

15. The method of claim 7, further comprising:

emitting the light incident on a first surface of the solid immersion mirror; and

reflecting the light on a second surface of the solid immersion mirror at a central portion of the first surface to be imaged on a central portion of the second surface at the opening.

16. A method of forming an opening using a near-field light generating element, comprising:

forming a super-resolution film on an exit surface of the element and a reflective film on the super-resolution film; and

forming an opening in the reflective film by use of a beam emitted from at least one of a first light source and a second light source,

the second light source disposed in a position conjugate with the first light source.

17. The method of claim 16, wherein the super-resolution film is a thin film having a diameter of the beam exiting from the super-resolution film smaller than the diameter of the beam incident of the super-resolution film.

18. The method of claim 17, wherein the element is a solid immersion mirror or a solid immersion lens.

19. A method of forming an opening using a near-field light generating element, comprising:

forming a high heat-absorbing film on an exit surface of the element and a reflective film on the high heat-absorbing film; and

forming an opening in the reflective film by use of a beam emitted from at least one of a first light source and a second light source,

the second light source disposed in a position conjugate with the first light source.